Microstructural and mechanical properties of Al-Cu functionally graded materials fabricated by powder metallurgy method

In the present work, four dissimilar-layered volume fraction of Al-Cu functionally graded materials were fabricated by using powder metallurgy. The volume fraction of Cu (0, 5, 10 and 15 wt%) powder mixture was hot pressed with a pressure of 400 MPa and sintered at 550 degrees C for 3 h as layer by layer. The mechanical and microstructural properties shows the material composition distribution of two-layered FGMs varies gradually. The properties such as density and hardness of FGMs was carried out in order to compare with homogeneous mixture of Non-FGM samples. A complete characterization of the microstructural graphs of FGMs achieved using Optical Microscope, Back scattered electron Mode, scanning electron microscopy and XRD analysis. The results shows an improved in micro-mechanical properties of the Al-Cu FGMs based on material selection and sintering temperature as well as dwell time. (C) 2019 Elsevier Ltd. All rights reserved.